Not in normal operation, and as long as your aux fans work. At least in the older diesels, the typical temperature is 87*C for the thermostat but Behrs have a reputation for running hot (if that was your replacement). Honestly, if it bothers you I would just go ahead and replace the tstat again, it isn't expensive.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth